Patent US3494513A successfully refreshed from Google Patents.
US3494513A
Expired / Lapsed
US
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Positive expulsion tank
Assignee: Bell Aerospace Corp
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Filing: 1966-08-11
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Granted: 1970-02-10
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Expires: 1986-08-11
Abstract
No abstract record available.
Inventors
- 👤 William H Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:23
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/60; F02K9/605; B; B64; B64G; B64G1/00; B64G1/22; B64G1/40; B64G1/402; B64G1/4021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |